Table 1.

Changes in the patellofemoral joint before and after the OWHTO

	Preoperative		Plate removal		Final follow-up
CDI	0.88	*	0.68	n.s	0.70
TA (degree)	8.74	*	5.25	n.s	4.39
LPS (mm)	6.26	*	4.41	n.s	4.88
LPS/p	0.120	*	0.089	n.s	0.099
MJS (mm)	7.5	*	5.66	p < 0.03	5.09
MJS/p	0.144	*	0.113	p < 0.05	0.104
LJS (mm)	6.56	*	5.82	*	5.25
LJS/p	0.126	*	0.116	*	0.107

CDI Caton–Deschamps index, TA patellar tilt angle (°), LPS lateral patellar shift (mm), LPS/p LPS/patella width, MJS medial PFJ joint space width (mm), MJS/p MJS/patella width, LJS lateral PFJ joint space width (mm), LJS/p LJS/patella width